Here are some stops for consideration:

Shelburne Museum http://shelburnemuseum.org/
Ben & Jerry's Ice Cream Factory http://www.benjerry.com/scoop-shops/factory-tours/
Mad River Glen/ App Gap (RT 17) http://www.madriverglen.com/
Island Pond http://www.islandpondchamber.org/
King Arthur Flour http://www.kingarthurflour.com/
Inn at Long Trail RT 100 & RT 4 http://www.innatlongtrail.com/Home.html
Bennington Battle Monument http://www.historicvermont.org/bennington/
Any Lake Champlain Ferry http://www.ferries.com/
Quechee Gorge http://www.vtstateparks.com/htm/quechee.htm